Should check tenantId and not jwtToken again

[goofybryan]

A check the jwtToken == null is done again, instead of tenantId == null or string.IsNullOrEmpty perhaps?

// Extracting the tenant ID
string tenantId = jwtToken.Claims.FirstOrDefault(c => c.Type == "tid")?.Value;
if (jwtToken == null)  // Should be if (string.IsNullOrEmpty(tentantId)) or if (tenantId == null)
{
    throw new SecurityTokenInvalidIssuerException("Expecting a tid claim from Azure Active Directory.");
}

active-directory-dotnet-native-aspnetcore-v2/2. Web API now calls Microsoft Graph/TodoListService/Extensions/AadIssuerValidator.cs

Line 32 in 500fc26

if (jwtToken == null)

[jmprieur]

Thanks @goofybryan !

This is now fixed in this sample,

I've raised a similar issue to fix it in https://github.com/Azure-Samples/active-directory-aspnetcore-webapp-openidconnect-v2: See #26

cc: @kalyankrishna1